Search  for anything...
Stiebel Eltron

Stiebel Eltron MegaBoost Tank Booster Water Heater | Increases Existing Tank Capacityup To 70%

  • Based on 27 reviews
Condition: New
Checking for the best price...
$493.26 Why this price?

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Only 10 left in stock, order soon!
Fulfilled by Cherise Trading
Arrives Tuesday, Sep 29
Order within 22 hours and 32 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Features

  • More hot water for more Showers or longer Showers
  • Saves space by making a small tank perform like a large tank
  • Fast & accurate hot water temperature adjustment for convenience and comfort
  • Increases existing tank capacity up to 70%
  • 200% faster recovery time
  • Saves money by preventing the increased standby losses of a larger tank replacement

Description

The MegaBoost is designed to be installed with any domestic hot water tank, new or existing, gas or electric. It will provide more hot water for longer showers and shorten the tank’s recovery time. It achieves its boosting effect at 100% efficiency. MegaBoost installation is flexible as it is designed to be installed on either the tank’s cold water inlet or on the hot water outlet. A 30-gallon tank with MegaBoost installed on the hot water outlet will provide 54% more hot water than the tank will without MegaBoost. If MegaBoost is installed on the cold water inlet it will provide 71% more hot water. In addition, the recovery rate for the tank is also reduced, significantly reducing the wait time for the tank to recharge. MegaBoost may allow using a smaller tank than a larger one which will save space and save money by preventing the increased standby losses of a larger tank.

Brand: Stiebel Eltron


Capacity: 30 gallons


Power Source: Wind Powered


Special Feature: 100% Efficient Boosting Effect, 200% Faster Recovery Time


Color: red,white


Power Source: Wind Powered


Special Features: 100% Efficient Boosting Effect, 200% Faster Recovery Time


Efficiency: 100%


Mount Type: Wall


Is Electric: No


Capacity: 30 gallons


Color: red,white


Style Name: Indoor Installation


Brand Name: Stiebel Eltron


Model Number: MegaBoost


Manufacturer: Stiebel Eltron


Manufacturer Warranty Description: 7 years against leakage / 3 years against defects in workmanship & materials.


UPC: 040232520648


Global Trade Identification Number: 48


Manufacturer Part Number: MegaBoost


Item Type Name: Tank Booster Water Heater


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Sep 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Packs a punch for a tiny thing!
Review Image by GM GM
Review Image by GM GM
Location: Albuquerque NM at the end of December. Incoming water temp is approx. 60 degrees Power: I had 6 awg wires with 50 amp double pole at the installation site. If I had to complain about anything it would be the wiring connector on the water heater. The location is fairly narrow. Items received: great steal from Amazon for $ 3 1 0 1 Mega booster. Came with 1/2” connector but also provided 1/2” to 3/4” bushing (I think that’s the name). Cable straps and screws, rubber cable seals, front panel with temperature dial, and relief valve. Day One: Installation was really easy. The instructions suggest using thread sealant. Against my better judgement I followed the instructions and had little leaks. I cleaned up the sealant and used thread tape and leaks were gone. Suggestion: install the power first (with breaker off) while the unit is on a flat surface. I have a 40 gal tank electric water heater that runs on 10 awg 30 amp dp. Before the mega boost, if two showers went at the same time both showers had to be quick or end up with a cold shower. Planned first shower. Two showers going at the same time. Both took their time and had a really nice hot shower with outdoor temps being in the 30’s at the end of December. The water temperature began to drop a tad. Family got out and I immediately gave the megaboost a whirl. I too enjoyed a fairly hot shower but the shower temperature dial had to be on max hot to get a nice decent hot shower. I took my time and a good 15 - 20 mins. Not scorching hot but hot enough. In ten minutes I tested the sink and the water was hot. I would definitely buy again. Once the tank dies I’m debating whether to swap it out with a tankless and megaboost combo. Same configuration as now. Megaboost first to heat up water before hitting the tank/tankless. I’ll try to add an update after a month or so of using the system. Update: 02-09-2021 Still going strong. My hot water lasts longer. Wife and kids are enjoying longer showers. I also installed an expansion tank to relieve pressure on my tank water heater. I increased the heat on my tank wh to 125-130. I plan to hook a hose up to the tankless in warmer months and test the output temp. Im curious! Update: 6/24 My city water is warmer. I did a quick test without a thermometer. The booster was producing very hot water (extracting water from release valve). I noticed the booster ran H O T when I throttled back the water pressure. When the water pressure was at max the water temp wasn’t as hot. My next update will contain temperatures. My 6 year old took a 3 hour shower, not a bath and my son took his shower right after and the water was still very hot. Keep in mind we’re at the peak of the summer. (My kids came home from swim practice in a swimming pool that was very cold.) Still receiving endless hot showers... Still planning to save space and install a tankless WH and a water softener. Will update again around August. Oops, it’s October and I forgot to save the summer water temp. I did run a test. When running hot water direct from the booster at full throttle the temperature was warm. Turn it down 50% and it got fairly hot. The booster was meant to help your tank heater recover quicker but not replace it. Keep that in mind. Therefore, if your faucets and shower heads aren’t efficient (high gpm) then your tank won’t keep up. I still love my booster, but my six year old daughter loves it more. She is enjoying her long 3-4 hour hot showers. I had to shut the hot water off a few tomes to get her out. <s I g h > ... show more
Reviewed in the United States on December 29, 2020 by GM GM
    • Great as stand alone tankless water heater.
Review Image by Happy shopper Happy shopper
Review Image by Happy shopper Happy shopper
I bought this to use as a on demand tankless water heater for my shop. It only provides hot water to my shop sink and a clothes washer. I didn't realize this was a "tank booster" until months after I bought it and the return window closed. I was afraid it would not provide enough hot water but I installed it anyway and I'm glad I did. This thing exceeds my needs, I'm getting very hot steamy water off my tap and reading Temps above 130 degrees. It takes about 15 seconds to get the water hot and I installed it on a 40 amp breaker direct wired into the heater. My only complaint is that routing the wire in and bending it into the terminals is difficult because there is very little room especially for heavy guage wire. Time will tell how the quality and longevity is. ... show more
Reviewed in the United States on February 4, 2024 by Happy shopper Happy shopper
    • Scammed us out of money
We ordered this. It arrived fine. It wasn't a version we could use. Apparently the printed label return instructions said we needed to double box it. The digital one didn't. They insisted we installed it, we didn't. We were charged a 50% restocking fee. For something we never used. Now we're out half our money and still need to but one that works. ... show more
Reviewed in the United States on September 13, 2022 by Megan S.
    • Worth it
This makes it pretty much impossible to run out of hot water.
Reviewed in the United States on January 25, 2022 by michael mc
    • It does it's job well.
It does it's job well.
Reviewed in the United States on February 13, 2021 by Brian D Bontempo
    • Flow limitation not usable
Questions answered by manufacturer says up to 4.5 GPM. However after installation and calling tech support they said I can’t do more than 2.5 GPM which makes the unit useless since 2.5 GOM flow to my house is unusable. They offered trade in on a bigger model but would require additional 220 wiring and breaker. I’m reverting to getting a second. standard how water tank. ... show more
Reviewed in the United States on December 17, 2021 by Glenn E Copen Jr
    • Great product.
Works great. Was easy to install. The only thing i had to do was bump up my CB to accommodate both my hotwater heater and the booster at the same time. As for the function...i was barley getting 10 minutes of hot water from my 40 gal take (& we love our long showers) but so far i have not ran out of water at all... i get over heated before the shower runs out. We love it. ... show more
Reviewed in the United States on February 14, 2021 by Robert Szabo

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...